Trader

Traders at some types of trading locations (Trading Caravans, Villages, Missions, Shaman Huts, Polar Stations) are willing to buy/sell specific types of items at different prices than their base values. A partially-complete table of those value modifiers grouped by trading location type can be found below.

Trading Caravans are the only trading location type which buys jewels and hunting trophies for an increased value. This can make them a powerful means to greatly increase the net value of your items. They are always found on flat terrain tiles (desert or plains (or dry lands?)) surrounded by six flat terrain tiles of that same type. They disappear after the first time you view their respective inventories, regardless of whether you take that opportunity to make trades or not.

For every 15 value you donate to a village, your standing in that region goes up by 1, up to a maximum of 10.

It sometimes makes sense to trade for animal teeth, pendulums, or tome pages, even at an increased price, to free up inventory space without having to dump items and lose those items' values.